First of all thank you for this class and all of your work. It is appreciated.

I have read the class and intend to spend more time on it. But I would like to ask please: can this class be used to send messages to people on networks such as Twitter, Facebook, Whatsapp, Skype, etc..?

The idea is to get members of my website to select the network (e.g. twitter) and provide their ids. Then, instead of sending them emails, I could simply use the "PHP OAuth API" to send a short notification message.